Discover one of the fiercest fighting chapters in the universe ... the Ultramarines 4th Company! Sergeant Learchus must take twenty-five newly recruited battle brothers on their first engagement, as they embark on an investigation of the lost patrol ship Guilliman's Honour. What was a routine mission becomes much more when 4th company encounters one of the Imperium's deadliest enemies!

Writer Graham McNeill (THE ULTRAMARINES OMNIBUS) and artist Kevin Hopgood (co-creator of Marvel Comic's U.S. WAR MACHINE) embark on a new chapter in the Empire Imperium’s fight for supremacy!